package com.ruoyi.system.service.impl;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.ruoyi.common.constant.UserConstants;
import com.ruoyi.common.core.domain.TreeSelect;
import com.ruoyi.common.core.domain.entity.SysMenu;
import com.ruoyi.common.core.domain.entity.SysRole;
import com.ruoyi.common.core.domain.entity.SysUser;
import com.ruoyi.common.utils.SecurityUtils;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.system.domain.vo.MetaVo;
import com.ruoyi.system.domain.vo.RouterVo;
import com.ruoyi.system.mapper.SysMenuMapper;
import com.ruoyi.system.mapper.SysRoleMapper;
import com.ruoyi.system.mapper.SysRoleMenuMapper;
import com.ruoyi.system.service.ISysMenuService;

/**
 * 菜单 业务层处理
 *
 * @author ruoyi
 */
@Service
public class SysMenuServiceImpl implements ISysMenuService {
    public static final String PREMISSION_STRING = "perms[\"{0}\"]";

    /**
     * 根据用户查询系统菜单列表
     *
     * @param userId 用户ID
     * @return 菜单列表
     */
    @Override
    public List<SysMenu> selectMenuList(Long userId) {
        return selectMenuList(new SysMenu(), userId);
    }

    /**
     * 查询系统菜单列表
     *
     * @param menu 菜单信息
     * @return 菜单列表
     */
    @Override
    public List<SysMenu> selectMenuList(SysMenu menu, Long userId) {
        List<SysMenu> menuList = null;
        // 管理员显示所有菜单信息
        if (SysUser.isAdmin(userId)) {
            menuList = menuMapper.selectMenuList(menu);
        } else {
            menu.getParams().put("userId", userId);
            menuList = menuMapper.selectMenuListByUserId(menu);
        }
        return menuList;
    }

    /**
     * 根据用户ID查询权限
     *
     * @param userId 用户ID
     * @return 权限列表
     */
    @Override
    public Set<String> selectMenuPermsByUserId(Long userId) {
        List<String> perms = menuMapper.selectMenuPermsByUserId(userId);
        Set<String> permsSet = new HashSet<>();
        for (String perm : perms) {
            if (StringUtils.isNotEmpty(perm)) {
                permsSet.addAll(Arrays.asList(perm.trim().split(",")));
            }
        }
        return permsSet;
    }

    /**
     * 根据用户ID查询菜单
     *
     * @param userId 用户名称
     * @return 菜单列表
     */
    @Override
    public List<SysMenu> selectMenuTreeByUserId(Long userId) {
        List<SysMenu> menus = null;
        if (SecurityUtils.isAdmin(userId)) {
            menus = menuMapper.selectMenuTreeAll();
        } else {
            menus = menuMapper.selectMenuTreeByUserId(userId);
        }
        return getChildPerms(menus, 0);
    }

    /**
     * 根据角色ID查询菜单树信息
     *
     * @param roleId 角色ID
     * @return 选中菜单列表
     */
    @Override
    public List<Integer> selectMenuListByRoleId(Long roleId) {
        SysRole role = roleMapper.selectRoleById(roleId);
        return menuMapper.selectMenuListByRoleId(roleId, role.isMenuCheckStrictly());
    }

    /**
     * 查询菜单使用数量
     *
     * @param menuId 菜单ID
     * @return 结果
     */
    @Override
    public boolean checkMenuExistRole(Long menuId) {
        int result = roleMenuMapper.checkMenuExistRole(menuId);
        return result > 0 ? true : false;
    }


}